# STC SA2958SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Granville Lasseter/dba Granville's Aircraft Strut Sealant, United States
- Description: Addition of Hydro Seal Fluid Additive to landing gear shock struts.
- Applied: January 16, 1979
- Status date: August 8, 1980
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-765](https://openairdocs.org/tcds/A-765)
- Certificate PDF: https://openairdocs.org/files/sha256/e5/c9/e5c99e09fb79298960eb14683708e4306d36387409538a8f447791ba2c0b1e98
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F5AE77DB5FF0DCD985256CC20008CB2E.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2958SW

## ADs that name it (0)

None.

## Approved models (6)

- Beechcraft Corporation D18C ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Beechcraft Corporation D18S ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Beechcraft Corporation E18S ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Beechcraft Corporation E18S-9700 ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Beechcraft Corporation G18S ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Beechcraft Corporation H18 ([TCDS A-765](https://openairdocs.org/tcds/A-765))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

Duplicate copy issued on July 23, 2002 ttmttd £>tatu of America ©epartment of transportation — federal 3triation administration Supplemental t^pe Certificate "<h-tat SA2958SW Granville taaseter c!/b/B GranviUa's Aircraft Strut Sealant 802 E. Grant Norton, Texaa 79346 f«>^^ 03 Mf, Civil Atr A" 765 Beech DISC. D18S, E18S, E18§-9700, G18S, H18 'fA*'yf>-faAanp*.. Addition of Hydro Seal Fluid Additive to the landing gear shock struts according to Specifications dated 12/26/76» or later FAA approved revision.

Compatibility of this modification with other prevloualy approved modifications must be determined by the installer.

^^^^^ January 16, 1979 March 21, 1979 'August 8, 1980 Revision 1

(Signntuie ) Don P. Watson Chief, Engineering and Manufacturing Branch (Title) ~~ ~" ^"y alteration of this certificate is punishable by a fine of no I exceeding S! ,000, or imprisonment not exceeding 3 years, or both.

FAAFot-3! 10-3|IO-6B| 1 his certificate may be transferred in accordance with f-AK 21 A7.

INSTRUCTIONS: Tha transfer endorsement below may be used to notify the appropriate FAA Regional Office of the transfer of tha Supplemental Type Certificate.

Tha FAA will reissue the certificate in the name of the transferee and forward it to him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (City, State, and ZIP code) from (Name of grantor) (Print or- type) (Address of grantor) (Number £ street) (City, State, and ZIP code) Extent of Authority (if licensing agreement):

Signature of grantor (Jn ink):

## Every issue (1)

- August 8, 1980: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/e5/c9/e5c99e09fb79298960eb14683708e4306d36387409538a8f447791ba2c0b1e98)

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